Drifts in shallow seas. Anglers who hook them by accident are often punished by its stinging acid.
It can sometimes be found all dry and shriveled up on a beach. Toss it back into the sea to revive it.
When the tide goes out, dehydrated TENTACOOL remains can be found washed up on the shore.
It drifts aimless ly in waves. Very difficult to see in water, it may not be noticed until it stings.
As it floats along on the waves, it uses its toxic feelers to stab anything it touches.
— Pokédex entries (via PokeAPI)